EPL.V · 2026-01-21 12:00:00

Eagle Plains Reports Significant High-Grade Copper, Gold and Silver Mineralization at the Theory Project, Toodoggone District

Exploration Programs

Eagle Plains Reports Significant High-Grade Copper, Gold and Silver

Mineralization at the Theory Project, Toodoggone District

Cranbrook, B.C., January 21, 2026: Eagle Plains Resources Ltd. (TSX-V:EPL) (OTCQB: EGPLF)

(“EPL” or “Eagle Plains”) is pleased to announce that partner Sun Summit Minerals Corp. (TSX -V:

SMN; OTCQB: SMREF) (“Sun Summit”) has received final analytical and petrographic results from

the 2025 field program at Eagle Plains’ Theory copper-gold project (the "Theory Project"), north-central

British Columbia. The property is owned 100% by Eagle Plains, with 122 hectares of the property subject

to an underlying 0.5% Net Smelter Royalty held by a third party.

The Theory Project borders Thesis Gold’s Ranch Project to the north and is located within 10 km to the

northwest of Sun Summit’s JD Project. Sun Summit has an exclusive option agreement with Eagle Plains

to earn up to a 100% interest in the project, located in the highly prospective Toodoggone Mining District.

2025 Highlights

New high grade copper discovery: Saboteur Zone

• 3km length zone of copper mineralization associated with coincident magnetic high transition

zone and strong radiometric potassic alteration anomaly

• 15 of the rock samples collected returned over 1% Cu

• Grab sample LSTHR040: 4.78% copper, 0.635 g/t gold, 49 g/t silver;

Fred-DM-DMR Zone:

• 1.6 km x 3km zone of copper mineralization associated with barite veining

• Grab sample BLTHR051: 6.42% copper, 0.088 g/t gold, 99 g/t silver;

• Grab sample JBTHR008: 0.65% copper, 12.6 g/t gold, 3150 g/t silver;

BEV Zone:

• Broad copper soil and silt geochemical anomaly associated with multiphase alteration

• Grab sample BLTHR029: 1.44% copper, 0.043 g/t gold, 12.8g/t silver;

Table 1. 2025 Rock Sample Highlights

Sample Zone Cu % Au g/t Ag g/t

BLTHR051 Fred/DM 6.42 0.088 99.0

JBTHR008 Fred/DM 0.65 12.60 3150.0

LSTHR040 Saboteur 4.78 0.635 48.6

JBTHR059 Saboteur 4.02 0.596 61.1

MHTHR037 Saboteur 3.27 4.290 121.0

JBTHR010 Bev-N 2.73 0.255 17.2

LSTHR020 Saboteur 2.8 0.0025 7.4

BLTHR029 Bev-Main 1.44 0.043 12.8

THTHR032 Bev-Main 0.1 0.169 0.3

Chuck Downie, P.Geo., President and CEO of Eagle Plains, commented, “We are very excited by the

results from the first fieldwork at the Theory Project in over thirty years, which underscores the unexplored

nature and exceptional geology of the property. Ground truthing of anomalies generated through airborne

geophysical and remote sensing surveys directly resulted in the Saboteur discovery, a multi kilometer scale

zone of copper mineralization. Advanced petrographic analyses, combined with field mapping of extensive

hydrothermal alteration zones and copper-gold-silver geochemical anomalies indicates the presence of a

proximal buried porphyry system. We eagerly look forward to the 2026 field program, and working with

Niel and Ken and the Sun Summit team to advance the property to drill testing.”

2025 Exploration Program

The 2025 exploration goals at the Theory Project were to identify and assess new areas of interest and to

refine drill targets generated through integrating historical data with new geophysical and geochemical

surveys. Eagle Plains and Sun Summit commissioned TerraLogic Exploration Inc. of Cranbrook, BC. to

design and execute the 2025 satellite remote sensing data acquisition, and field programs.

During the 14-day field program, a total of 258 rock grab samples, 417 soil samples, and 40 silt samples

were collected , and geological and structural mapping was completed on primary target areas. Select

samples were sent for petrographic analyses and interpretation.

Comprehensive data interpretation and analyses is underway to define and prioritize targets for 2026

fieldwork and detailed IP geophysical surveys to generate and refine targets for diamond drill testing.

Field Results

All primary targets of interest were prospected/geologically mapped and sampled. Most targets are

underlain by mafic volcanic sequences of the Takla Group, with Jurassic Hazelton Group intermediate and

mafic volcanics and related sediments encountered at t he Stik, DAR and southernmost Bev areas. The

volcanic stratigraphy is mostly homoclinal at scale of 100’s to 1000+ meters, with shallow dips (15 -35°)

towards the N or NE the most common, such that a layer -cake stratigraphy approximates the general

structural layout of the property – a pattern that is also evident in the airborne RTP magnetics.

Many mineralized veins and fractures exploit bedding parallel structures, but there are also a significant

number of steep mineralized structures with NE and NW strikes, with smaller subsets of E or N striking

veins and fractures.

The Takla group stratigraphy comprises a repetitive sequence of fine mafic tuff, feldspar ± pyroxene

crystal tuff with some pillow basalt, trachyitic basalt, and crystal -lithic lapilli ± bomb proximal vent

basalts. More mapping is required to establish the detailed relationship between mineralized structures and

volcanic stratigraphy.

The most common mineralized structures, comprise copper minerals (chalcopyrite, bornite, chalcocite)

with lesser to equal proportions of pyrite or pyrrhotite, and associated malachite and azurite, in quartz -

carbonate-epidote gangue. Azurite intensity appears coincident with presence of bornite and/or chalcocite.

Wall rocks are usually moderately to strongly epidote -carbonate ± hematite altered, with variable but

commonly high magnetics that is more a function of primary lithology (fine mafic tuffs are commonly the

most magnetic). Barite veins are commonly spatially associated with these copper mineralized structures.

At the Bev showing, gossans are widespread with large zones ranging 10’s to over 100 m. A quartz -

sericite-pyrite (QSP) alteration-mineralization assemblage is typical of the gossans, with pyrite contents

ranging from trace to 5%, but typically in the 1% ra nge, and finely disseminated. The QSP alteration

generally obscures protolith textures, but certainly does transcend lithological boundaries, having

relatively steep orientation rather than being bedding parallel. Veining is this zone is quartz -pyrite ±

sericite dominant

Table 2. 2025 Rock Sample Results – Summary Statistics

2025 Theory

Rocks All

ppb

ppm

Count 258 258 258 258 258 258 258 258 258

Minimum 2.5 10 0.1 2.1 0.12 0.8 0.07 8 0.01

Maximum 12600 10000 285 64200 404 5570 980 39900 3150

Mean 127.3 925.3 18.7 3940.9 4.2 86 8.3 305.5 21

Median 5.5 575 8.2 296 0.86 9 1.64 93.5 0.47

Std Dev. 843.6 1120.6 38.9 8875 25.8 411 62.4 2499.1 197.6

75 percentile 25.25 1192.5 14.8 3252.5 1.9725 22 3.1325 160.25 3.6975

90 percentile 149.8 2241 33.09 11365 4.652 104.05 8.426 245.3 21.38

95 percentile 471 3003.5 77.93 25625 13.4625 436.15 17.06 431.85 61.12

99 percentile 2673.4 5668.1 243.84 50629 49.309 1978.4 135.84 2887.85 219.85

Saboteur Zone

The newly discovered Saboteur Zone is defined by a 3km long NE trending magnetic high with consistent

copper mineralization (c halcopyrite, bornite and chalcocite ) associated with epidote-quartz-carbonate

veins and fractures. Highlights include grab samples LSTHR040 with 4.7% copper, 0.635 g/t gold, 49

g/t silver; JBTHR059 with 4.0% copper, 0.596 g/t gold, 61 g/t silver; and MHTHR037 with 3.3%

copper, 4.290 g/t gold, 121 g/t silver.

Grab samples from the adjacent Provocateur and BEV-N targets include LSTHR020 with 2.8% copper,

0.0025 g/t gold, 7.4 g/t silver; and (Bev -N): JBTHR010 with 2.73% copper, 0.255 g/t gold, 17.2 g/t

silver.

Soil samples collected on Saboteur peak returned a maximum of 2.61 % ppm copper, 0.410 g/t gold, and

10.4 g/t silver (MHTHD130).

BEV Zone

The best grab sample from the BEV-main zone returned 1.44% copper, 0.043 g/t gold, 12.8 g/t silver

(BLTHR029). Soil and stream-silt results from this main drainage at the Bev zone returned some of the

best geochemical results of the 2025 program , defining a multi -element copper dominant geochemical

anomaly approximately 1km x 700m, open in three directions. . Detailed geological mapping in the BEV

area defined a broad zone of multiphase alteration associated with copper mineralization in epidote -

quartz–carbonate veins, and peripheral quartz -sericite-pyrite (QSP) altered gossans, highlighting the

possibility of a large buried porphyry system.

FRED-DM-DMR Zone

Prospecting at the Fred -DM area focused on an approximately 5km linear magnetic high-low transition

zone. Copper mineralization in veins and fractures are associated with NNE trending barite veins, up to

4m in width, that are exposed over 150m length. Grab samples from Fred-DM corridor returned the highest

values from the 2025 program. Highlight samples include BLTHR051 with 6.42% copper, 0.088 g/t gold,

99 g/t silver ; and JBTHR008 with 0.65% copper, 12 .6 g/t gold, 3150 g/t silver. Soil sampling and

prospecting indicate that the strike length of the barite mineralization exceeds over 1 kilometer.

STIK 1

Fieldwork at the STIK1 identified epithermal style alteration and mineralization within a granodioritic to

dioritic intrusion, as well as in metasediments along the intrusive contact.

Petrographic Results and Interpretation

12 select samples were prepared by Precision Petrographics of Vancouver BC for thin section analyses

and interpretation. The petrographic work identified strong epidote -chlorite-carbonate alteration directly

with hypogene copper mineralization (chalcopyrite – bornite – chalcocite). This type of mineralization and

alteration assemblage is interpreted to represent the inner shell of a porphyry system, which may indicate

a proximal source for some of the Theory mineralization.

Next Steps

Planning is now underway for a significant exploration program across the Theory Project in 2026. Details

of the program will be released once targets ranks are prioritised and all new analytical data have been

interpreted. A priority focus will be on the BEV to Saboteur trend of strong copper mineralization.

Table 3. Significant 2025 Silt Sample Results

Sample_# Sample Ag_ppm Au_ppb Cu_ppm Mo_ppm

MHTHS007 silt 0.40 84.30 1385 20.5

MHTHS008 silt 0.67 25.60 986 1.1

JBTHS005 silt 0.38 60.50 954 12.2

LSTHS004 silt 0.37 48.70 826 7.7

MHTHS009 silt 0.96 49.60 382 1.3

Table 4. Significant 2025 Soil Sample Results

Sample_# Sample Ag_ppm Au_ppb Cu_ppm Mo_ppm

MHTHD130 soil 10.50 410.00 26100 0.9

MHTHD011 soil 0.82 21.60 833 0.8

MHTHD058 soil 0.47 12.60 798 2.4

MHTHD034 soil 0.25 3.20 794 0.8

MHTHD009 soil 0.17 11.20 749 0.5

MHTHD068 soil 0.81 14.80 634 1.3

Figure 1. 2025 Theory Results Compilation

Figure 2a. Copper results at the Theory Project.

Figure 2b. Gold results at the Theory Project

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